Author Question: A painful disease in which oxygen-carrying red blood cells change into abnormal shapes is called: ... (Read 63 times)

crazycityslicker · **on:** Aug 11, 2018

A painful disease in which oxygen-carrying red blood cells change into abnormal shapes is called:

a. anemia
b. natural blood selection
c. trisomy 21
d. sickle-cell anemia

Question 2

The only way to thoroughly investigate our past is to excavate sites where biological and cultural remains are found. Unfortunately, excavation results in the site's destruction.

a. True
b. False
Indicate whether the statement is true or false